<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form method="post" enctype="multipart/form-data" action="/file">
  <input type="file" name="file"/>
  <input type="submit" value="确定"/>
</form>
</body>
</html>